A novel three-liquid-phase extraction system （TES） composed of butyl acetate, block copolymer polyethylene oxide-polypropylene oxide-polyethylene oxide and ammonium sulphate aqueous solution [（NH4）2SO4] as top, mi...A novel three-liquid-phase extraction system （TES） composed of butyl acetate, block copolymer polyethylene oxide-polypropylene oxide-polyethylene oxide and ammonium sulphate aqueous solution [（NH4）2SO4] as top, middle, and bottom phase, respectively, has been developed. The copolymer recycling and partitioning behavior of penicillin V has been studied in this system. Results show that the copolymer could be purified and recycled and penicillin V of the filtrated ferment broth could be partitioned unevenly among the phases and purified in the top phase of this TES. About 90 wt.% of penicillin V could be distributed into the top phase around pH 2.5 and only less than 0.1 wt.% left in the bottom phase.展开更多
采用支撑液膜技术建立了进料相、膜相、反萃取相三相体系,实现了对洁霉素的分离提纯。该体系采用了洁霉素+异构烷烃(Isopar L)+HCl的反应体系,验证了进料浓度(Cbf)、进料相溶液pH、反萃取相溶液pH、萃取剂组成等因素对分配系数(D)的影...采用支撑液膜技术建立了进料相、膜相、反萃取相三相体系,实现了对洁霉素的分离提纯。该体系采用了洁霉素+异构烷烃(Isopar L)+HCl的反应体系,验证了进料浓度(Cbf)、进料相溶液pH、反萃取相溶液pH、萃取剂组成等因素对分配系数(D)的影响。同时,优化了膜组件实现萃取实验的操作条件,根据传质过程建立了数学模型。结果显示:当洁霉素Cbf为11.9 mmol/L、Isopar L体积分数(VF)为80%、进料相pH为10.1、反萃取相pH为1.2时,D最大为2.34。确定了膜组件操作条件为:管程流量Vf=520 m L/min,壳程流量Vs=500 m L/min。根据所建的数学模型分析了各部分传质阻力,其中管程传质阻力为6.7×10~5s/m,壳程传质阻力为3.7×10~5s/m,跨膜传质阻力为2.7×10~6s/m,跨膜传质阻力起主要作用。展开更多
基金Innovative Research Group Science Fund (No. 0221603), the National Natural Science Foundation (No. 20406021) and he National Natural Science Key Foundation (No. 20236050) of China
文摘A novel three-liquid-phase extraction system （TES） composed of butyl acetate, block copolymer polyethylene oxide-polypropylene oxide-polyethylene oxide and ammonium sulphate aqueous solution [（NH4）2SO4] as top, middle, and bottom phase, respectively, has been developed. The copolymer recycling and partitioning behavior of penicillin V has been studied in this system. Results show that the copolymer could be purified and recycled and penicillin V of the filtrated ferment broth could be partitioned unevenly among the phases and purified in the top phase of this TES. About 90 wt.% of penicillin V could be distributed into the top phase around pH 2.5 and only less than 0.1 wt.% left in the bottom phase.
文摘采用支撑液膜技术建立了进料相、膜相、反萃取相三相体系,实现了对洁霉素的分离提纯。该体系采用了洁霉素+异构烷烃(Isopar L)+HCl的反应体系,验证了进料浓度(Cbf)、进料相溶液pH、反萃取相溶液pH、萃取剂组成等因素对分配系数(D)的影响。同时,优化了膜组件实现萃取实验的操作条件,根据传质过程建立了数学模型。结果显示:当洁霉素Cbf为11.9 mmol/L、Isopar L体积分数(VF)为80%、进料相pH为10.1、反萃取相pH为1.2时,D最大为2.34。确定了膜组件操作条件为:管程流量Vf=520 m L/min,壳程流量Vs=500 m L/min。根据所建的数学模型分析了各部分传质阻力,其中管程传质阻力为6.7×10~5s/m,壳程传质阻力为3.7×10~5s/m,跨膜传质阻力为2.7×10~6s/m,跨膜传质阻力起主要作用。
